摘 要

近年来，国内经济迅速发展，越来越多的速路和桥梁被修建，悬索桥作为桥梁界大跨度桥梁使用桥型的一种，也越来越多的被采用，悬索桥的技术、理论也越来越完善；而悬索桥技术里，主缆的假设无疑是其中的重点也是难点。主缆架设往往跨过大江大河或者沟堑峭壁，往往都是高空作业，危险系数，难度系数都是极高，而猫道施工工序的诞生发展，有效的解决了高空作业的平台问题，通过猫道的架设，为主缆架设提供了可靠的安全的施工平台，大大提高了施工的效率和安全性，本文通过对猫道的理论基础施工工序进行实地评估，以重庆驸马长江大桥为实例，研究内容如下：

（1）传统工艺猫道架设中猫道的基本组成部分：猫道承重索和扶手索、猫道的面层、猫道的锚固体系、塔顶转索鞍及变位系统、猫道面层操作平台、猫道横向防风通道、猫道门架承重索和猫道门架等基本部分组成。

（2）猫道施工工艺的验证：猫道承重索和扶手索的牵引架设方案、猫道面层的铺设过程、猫道门架承重索的架设及门架安装。其中猫道承重索及扶手索安装包含猫道垂度调整，猫道基本架设完成后还有猫道整体垂度的调整。

（3）猫道工艺的总结及评价：猫道架设工序按照基本组成及猫道构造的相对关系，第一工序是猫道承重索的牵引，其中第一根牵引绳过江方案的选择是重点；之后根据猫道空间线形要求承重索垂度初调，接着南北主塔塔顶的转索鞍及变位系统安装。猫道承重索安装完成后，以此为承受力的基础，安装猫道其他的组成部分，最后进行猫道整体的垂度调整达到施工的空间要求。按照理论施工工序猫道施工有序进行，能够高效、安全的完成猫道架设。

本文通过实践对猫道既有的施工工序进行测试评估，对原有猫道工序进行规范化理论化的总结，从而证明了既有工序的科学性、正确性；同时，经过猫道实际施工对猫道架设过程的工序间的衔接及工序的顺序有了明确的优化，使得猫道的架设更安全高效，为后面悬索桥主缆猫道铺设提供了可靠的参考。

关键词：猫道组成；猫道承重索；变位系统；垂度调整。

Abstract

In recent years, the rapid development of domestic economy, more and more roads and bridges have been built, suspension bridge as a bridge of long span bridges using bridge type A, also more and more be adopted, suspension bridge theory more and more perfect.  the hypothesis is undoubtedly one of the key and difficult points in the suspension bridge main cable technology,Main cable erection often crossed the river and trench cliffs, often high-altitude operations, risk factor,and difficulty coefficient is extremely high, now the cat construction process of birth and development, effectively solves the problem of aerial work platform .Through the erection of cat Road, the main cable erection provides a reliable and safe construction platform, greatly improving the efficiency and safety of the construction, this paper through the theoretical basis of the cat road construction process to conduct on-site assessment.The Chongqing Hospital of Yangtze River bridge as an example, the research contents are as follows ：

(1)the basic components of the traditional process of catwalk erection catwalk: catwalk bearing cable and a handrail cable, surface layer of a cat, cat anchorage system top turn saddle and variable system, cat pavement layer operation platform, cat lateral wind channel, cat door frame bearing cable and the catwalk door frame and basic part. 

(2)Catway construction process validation: catwalk bearing cable and a handrail cable traction erection scheme, Catway surface paving process, cat door frame bearing cable erection and portal frame is installed. The cat load-bearing cable and handrail cable installations include catwalk sag adjustment, catwalk basic after the completion of erection also have catwalk overall sag adjustment .

(3)Summary and evaluation of the cat way process:According to the basic composition and the relative relationship of the cat track, the first working procedure is the traction of the catway bearing rope, the first of which is the important point of the river crossing scheme.After according to the catwalk space alignment requirements of bearing cable vertical adjustment of the first, then north and South Main Tower turn cable saddle and a displacement system installation. And then catwalk bearing cable installation is complete, taking the opportunity of bearing capacity of foundation and installation of other part of the catwalk. Finally, catwalk overall vertical transfer to the whole so as to meet the requirements of the construction of a space. In accordance with the theory of the construction process of the Catway construction in an orderly manner, can be efficient and safe completion of the erection of the Catway.

In this article, through the practice of the Catway construction process for testing and evaluation of the existing procedures for the standardization of the cat, the summary of the theory, so as to prove the existing processes of scientific, correct .At the same time, after the catwalk actual construction sequence on the catwalk erection process interface and process with explicit optimization, the catwalk erection of safe and efficient, behind the main cable of the suspension bridge catwalk laying provides a reliable reference.

Key words: The composition of the cat road ; the erection of the bearing cable ; the top of the tower to the cable saddle and the position system ; the vertical adjustment.

目录

第1章 绪论 3

1.1猫道架设施工工序的研究背景及意义 3

第2章 理论基础 3

2.1 编制依据 4

2.2工程概况 4

2.2.1 工程简介 4

2.2.2猫道概况 5

第3章 猫道设计方案 6

3.1猫道总体设计 6

猫道总体布置图3.1.1 6

3.2猫道结构简介 6

3.2.1猫道承重索及扶手索 6

3.2.2猫道面层 7

3.2.3猫道锚固体系 7

3.2.4塔顶转索鞍及变位系统 7

3.2.5猫道面层操作平台 8

3.2.6横向通道 8

3.2.7猫道门架承重索及猫道门架 8

3.3.1水文条件 9

3.3.2气象条件 10

3.3.3航道情况 10

第4章 施工准备 11

4 施工准备 11

4.4.1人员组成 12

4.4.2施工人员培训 12

4.5主要施工设备及布置 13

4.5.1机具准备 13

4.5.2猫道架设机具布置 13

4.6现场条件确认 13

4.7 施工保障措施落实 14

4.7.1 配件及安全劳保用品的落实 14

4.7.2 了解航道运输情况 14

第5章 施工工序 15

5.1承重索架设过程 15

5.2面网铺设过程 15

第6章 施工方案验证与评估 17

6.1猫道承重索架设 17

6.2猫道承重索垂度调整 21

6.3猫道面层铺设和横向通道安装 23

6.4门架承重索架设与垂度调整 24

6.5猫道门架、猫道扶手安装 24

6.6照明警示等附属结构安装 25

6.7猫道的垂度调整步骤 25

第7章 质量控制与方案评估 27

7.1机具设备、原材质量控制 27

7.2猫道绳索质量控制 27

7.3预埋件质量控制 28

7.4其它质量控制 29

7.5施工质量控制 30

7.5.1猫道架设施工质量控制 30

7.5.2预埋件施工质量控制 31

7.6 重庆驸马长江大桥猫道架设施工过程中存在的不足 31

第8章 结论 32

8.1综合评价及总结 32

致谢 34

参考文献 34

第1章 绪论

1.1猫道架设施工的研究背景及意义

随着国内经济的发展生产的进步，桥梁道路的需求应用越来越广泛，其中悬索桥技术越来越趋于成熟，悬索桥的施工涉及到主缆的架设，使用比较广泛的猫道施工法又是主缆架设的常规方法。毕业将近，作为土木专业学生有幸得到机会，在重庆驸马长江大桥上部结构施工项目上实习。而驸马长江大桥作为国内已有和在建的悬索桥中跨度靠前的大型悬索桥，主缆施工是整个上部结构的关键，采用猫道施工法。通过实践了解猫道的架设施工工序，对猫道架设施工工序有更加系统的认知，为以后大跨径悬索桥的主缆架设施工提供可靠的参考方案。

1.2 国内外悬索桥采用猫道施工架设主缆的现状